Display device and method for providing the same

1. A display device comprising: a substrate including a display area and a non-display area; a light-emitting element layer in the display area of the substrate; a color conversion layer facing the light-emitting element layer and including a bank in the display area of the substrate and extending from the display area and into the non-display area of the substrate; a capping layer in the display area and the non-display area of the substrate and covering the bank; a plurality of color filters in the display area and in the non-display area of the substrate, wherein the plurality of color filters in the non-display area overlap each other; and in order from the plurality of color filters, in a direction away from the substrate: an overcoat layer in the display area and the non-display area of the substrate and respectively covering the plurality of color filters; and an optically-functional layer in the display area and the non-display area of the substrate and facing the overcoat layer, wherein in the non-display area: each of the substrate, the capping layer, each of the plurality of color filters, and the overcoat layer has a lateral side which is furthest from the display area, and the lateral side of the substrate, the lateral side of the capping layer, the lateral side of each of the plurality of color filters, and the lateral side of the overcoat layer are coplanar with one another.

2. The device of claim 1, wherein the bank has a lateral side which is furthest from the display area, and the lateral side of the bank is spaced apart from the lateral side of the substrate and closer to the display area than the lateral side of the substrate.

3. The device of claim 1, further comprising an insulating layer between the substrate and the light-emitting element layer, wherein within the non-display area, a portion of the capping layer is in contact with the insulating layer and extends parallel to the substrate.

4. The device of claim 3, wherein within the non-display area, the bank has a lateral side which is furthest from the display area, and the portion of the capping layer is between the lateral side of the substrate and the lateral side of the bank.

5. The device of claim 3, wherein the insulating layer has a lateral side which is furthest from the display area, and the lateral side of the insulating layer is coplanar with the lateral side of the substrate.

6. The device of claim 1, wherein the plurality of color filters includes a first color filter which transmits light of a first color and a second color filter which transmits light of a second color different from the first color, and within the non-display area, the plurality of color filters which overlap each other includes the second color filter, the first color filter and the overcoat layer in order from the substrate.

7. The device of claim 6, wherein the plurality of color filters further includes a third color filter which transmits light of a third color different from the first color and the second color, and within the non-display area, the plurality of color filters which overlap each other includes the second color filter, the first color filter, the third color filter and the overcoat layer are in order from the substrate.

8. The device of claim 1, wherein the light-emitting element layer includes: a plurality of light-emitting elements; and a thin-film encapsulation layer on the plurality of light-emitting elements, wherein the thin-film encapsulation layer includes in order from the plurality of light-emitting elements: a first encapsulation inorganic layer; an encapsulation organic layer; and a second encapsulation inorganic layer.

9. The device of claim 8, wherein each of the plurality of light-emitting elements includes an organic light-emitting diode or an inorganic light-emitting diode.

10. The device of claim 1, wherein the optically-functional layer has a lateral side which is furthest from the display area, and the lateral side of the optically-functional layer is coplanar with the lateral side of the substrate.

11. The device of claim 1, wherein the optically-functional layer has a lateral side which is furthest from the display area, and in a direction along the substrate, the lateral side of the optically-functional layer is spaced apart from the lateral side of the substrate.

12. The device of claim 1, further comprising in the non-display area of the substrate, a plurality of protruded portions which protrude from the substrate toward the bank, and each of the plurality of protruded portions being between the bank and the substrate and corresponding to the plurality of color filters which overlap each other in the non-display area.

13. The device of claim 1, further comprising within the non-display area: a trench which is defined in the bank, and a bank pattern which is spaced apart from a remainder of the bank by the trench and closer to the lateral side of the substrate then the remainder of the bank.

14. The device of claim 13, wherein the trench has a closed loop shape surrounding the display area.

15. A display device comprising: a substrate including a display area and a non-display area; a light-emitting element layer in the display area of the substrate; a color conversion layer facing the light-emitting element layer and including a bank in the display area of the substrate and extending from the display area and into the non-display area of the substrate; a capping layer in the display area and the non-display area of the substrate and covering the bank; a plurality of color filters in the display area and in the non-display area of the substrate, wherein the plurality of color filters in the non-display area overlap each other; and in order from the plurality of color filters, in a direction away from the substrate a first overcoat layer in the display area and the non-display area of the substrate and respectively covering the plurality of color filters; and an optically-functional layer in the display area and the non-display area of the substrate and facing the first overcoat layer, wherein within the non-display area: each of the substrate, the capping layer, each of the plurality of color filters, and the first overcoat layer has a lateral side which is furthest from the display area, the lateral side of the substrate, the lateral side of the capping layer, the lateral side of each of the plurality of color filters, and the lateral side of the first overcoat layer are coplanar with one another, the first overcoat layer has a top face which is furthest from the substrate and respectively at a vertical level relative to the substrate in the non-display area and in the display area, and the vertical level of the top face of the first overcoat layer which is in the non-display area is equal to the vertical level of the top face of the first overcoat layer which is in the display area.

16. The device of claim 15, further comprising a second overcoat layer in the display area and the non-display area of the substrate and facing the first overcoat layer with the plurality of color filters therebetween, wherein the second overcoat layer is closer to the substrate than the first overcoat layer and has a top face which is furthest from the substrate and respectively at a vertical level relative to the substrate in the non-display area and in the display area, and the vertical level of the top face of the second overcoat layer which is in the display area is greater than the vertical level of the top face of the second overcoat layer which is in the non-display area.

17. The device of claim 15, wherein the bank has a top face which is furthest from the substrate and respectively at a vertical level relative to the substrate in the non-display area and in the display area, and the vertical level of the top face of the bank which is in the display area is greater than the vertical level of the top face of the bank which is in the non-display area.